Data / Rankings / High school graduate or higher, population 25 and over / Counties in Idaho

Counties in Idaho by high school graduate or higher, population 25 and over

Madison County had the highest high school graduate or higher, population 25 and over of 44 counties in 2022, at 97.4%. Clark County had the lowest, at 61.7%. The median was 90.4% and the figure for Idaho was 91.4%. Source: the U.S. Census Bureau.

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Highest97.4Madison County
Lowest61.7Clark County
Median90.444 counties
Idaho91.4History

Map of counties, 2022

Ada County: 95.3 %Adams County: 94 %Bannock County: 93.4 %Bear Lake County: 93.1 %Benewah County: 85.1 %Bingham County: 88.4 %Blaine County: 91.8 %Boise County: 95.4 %Bonner County: 91.3 %Bonneville County: 92 %Boundary County: 86.9 %Butte County: 90.4 %Camas County: 87.2 %Canyon County: 87 %Caribou County: 90.4 %Cassia County: 85.7 %Clark County: 61.7 %Clearwater County: 91.8 %Custer County: 91.3 %Elmore County: 88 %Franklin County: 92.1 %Fremont County: 89.8 %Gem County: 90.2 %Gooding County: 79 %Idaho County: 92.3 %Jefferson County: 92.6 %Jerome County: 75.3 %Kootenai County: 93.6 %Latah County: 96.9 %Lemhi County: 91.7 %Lewis County: 89.9 %Lincoln County: 81.6 %Madison County: 97.4 %Minidoka County: 81.3 %Nez Perce County: 93 %Oneida County: 93.4 %Owyhee County: 76.1 %Payette County: 85.9 %Power County: 84.3 %Shoshone County: 88.1 %Teton County: 93.4 %Twin Falls County: 87.4 %Valley County: 92.8 %Washington County: 90.2 %
  • Under 85
  • 85 to 88
  • 88 to 90
  • 90 to 92
  • 92 to 93
  • 93 and over
%, 2022. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2022

Madison County: 97.4 %Madison County97.4Latah County: 96.9 %Latah County96.9Boise County: 95.4 %Boise County95.4Ada County: 95.3 %Ada County95.3Adams County: 94 %Adams County94Kootenai County: 93.6 %Kootenai County93.6Teton County: 93.4 %Teton County93.4Oneida County: 93.4 %Oneida County93.4Bannock County: 93.4 %Bannock County93.4Bear Lake County: 93.1 %Bear Lake County93.1Nez Perce County: 93 %Nez Perce County93Valley County: 92.8 %Valley County92.8Jefferson County: 92.6 %Jefferson County92.6Idaho County: 92.3 %Idaho County92.3Franklin County: 92.1 %Franklin County92.1Bonneville County: 92 %Bonneville County92Blaine County: 91.8 %Blaine County91.8Clearwater County: 91.8 %Clearwater County91.8Lemhi County: 91.7 %Lemhi County91.7Bonner County: 91.3 %Bonner County91.3Custer County: 91.3 %Custer County91.3Caribou County: 90.4 %Caribou County90.4Butte County: 90.4 %Butte County90.4Washington County: 90.2 %Washington County90.2Gem County: 90.2 %Gem County90.2Lewis County: 89.9 %Lewis County89.9Fremont County: 89.8 %Fremont County89.8Bingham County: 88.4 %Bingham County88.4Shoshone County: 88.1 %Shoshone County88.1Elmore County: 88 %Elmore County88Twin Falls County: 87.4 %Twin Falls County87.4Camas County: 87.2 %Camas County87.2Canyon County: 87 %Canyon County87Boundary County: 86.9 %Boundary County86.9Payette County: 85.9 %Payette County85.9Cassia County: 85.7 %Cassia County85.7Benewah County: 85.1 %Benewah County85.1Power County: 84.3 %Power County84.3Lincoln County: 81.6 %Lincoln County81.6Minidoka County: 81.3 %Minidoka County81.3Gooding County: 79 %Gooding County79Owyhee County: 76.1 %Owyhee County76.1Jerome County: 75.3 %Jerome County75.3Clark County: 61.7 %Clark County61.7Madison County: 97.4 %Madison County97.4Latah County: 96.9 %Latah County96.9Boise County: 95.4 %Boise County95.4Ada County: 95.3 %Ada County95.3Adams County: 94 %Adams County94Kootenai County: 93.6 %Kootenai County93.6Teton County: 93.4 %Teton County93.4Oneida County: 93.4 %Oneida County93.4Bannock County: 93.4 %Bannock County93.4Bear Lake County: 93.1 %Bear Lake County93.1Nez Perce County: 93 %Nez Perce County93Valley County: 92.8 %Valley County92.8Jefferson County: 92.6 %Jefferson County92.6Idaho County: 92.3 %Idaho County92.3Franklin County: 92.1 %Franklin County92.1Bonneville County: 92 %Bonneville County92Blaine County: 91.8 %Blaine County91.8Clearwater County: 91.8 %Clearwater County91.8Lemhi County: 91.7 %Lemhi County91.7Bonner County: 91.3 %Bonner County91.3Custer County: 91.3 %Custer County91.3Caribou County: 90.4 %Caribou County90.4Butte County: 90.4 %Butte County90.4Washington County: 90.2 %Washington County90.2Gem County: 90.2 %Gem County90.2Lewis County: 89.9 %Lewis County89.9Fremont County: 89.8 %Fremont County89.8Bingham County: 88.4 %Bingham County88.4Shoshone County: 88.1 %Shoshone County88.1Elmore County: 88 %Elmore County88Twin Falls County: 87.4 %Twin Falls County87.4Camas County: 87.2 %Camas County87.2Canyon County: 87 %Canyon County87Boundary County: 86.9 %Boundary County86.9Payette County: 85.9 %Payette County85.9Cassia County: 85.7 %Cassia County85.7Benewah County: 85.1 %Benewah County85.1Power County: 84.3 %Power County84.3Lincoln County: 81.6 %Lincoln County81.6Minidoka County: 81.3 %Minidoka County81.3Gooding County: 79 %Gooding County79Owyhee County: 76.1 %Owyhee County76.1Jerome County: 75.3 %Jerome County75.3Clark County: 61.7 %Clark County61.7
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2022 (%)Change on 2021
1Madison County97.4+1.8 pts
2Latah County96.9+0.4 pts
3Boise County95.4+0.7 pts
4Ada County95.3+0.3 pts
5Adams County94+1.5 pts
6Kootenai County93.60 pts
7Teton County93.4+1 pts
8Oneida County93.4+3.3 pts
9Bannock County93.4+0.1 pts
10Bear Lake County93.1-0 pts
11Nez Perce County93-0.2 pts
12Valley County92.8+2.2 pts
13Jefferson County92.6+0.8 pts
14Idaho County92.3+0.1 pts
15Franklin County92.1-0.7 pts
16Bonneville County92-0.5 pts
17Blaine County91.8+1.8 pts
18Clearwater County91.8-0.7 pts
19Lemhi County91.7+1.7 pts
20Bonner County91.3-0.6 pts
20Custer County91.3+4.3 pts
22Caribou County90.4+0.7 pts
23Butte County90.4+1.2 pts
24Washington County90.2+2.4 pts
25Gem County90.2+2.4 pts
26Lewis County89.9-0 pts
27Fremont County89.8+1.3 pts
28Bingham County88.4-0.9 pts
29Shoshone County88.1-0.3 pts
30Elmore County88-1.2 pts
31Twin Falls County87.4+0.4 pts
32Camas County87.2+7.7 pts
33Canyon County87+0.5 pts
34Boundary County86.9-1.4 pts
35Payette County85.9-0.2 pts
36Cassia County85.7+1.4 pts
37Benewah County85.1-0.7 pts
38Power County84.3+4.8 pts
39Lincoln County81.6+0.2 pts
40Minidoka County81.3+2.2 pts
41Gooding County79+1.8 pts
42Owyhee County76.1+1.2 pts
43Jerome County75.3-1 pts
44Clark County61.7-3.7 pts

Other periods

About this ranking

People aged 25 and over who hold a regular high school diploma, a GED or alternative credential, or any higher level of education, as a percentage of all people aged 25 and over. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Measures the adult population, not students: it is not the high school graduation rate of a class. Not comparable with the EU share below upper secondary education, which covers ages 25 to 64.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b15003.dat. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs (Counties in Idaho by high school graduate or higher, population 25 and over, 2022) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b15003.dat

MLA 9

American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs, Counties in Idaho by high school graduate or higher, population 25 and over, 2022. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b15003.dat. Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/idaho-counties?period=2022. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. Counties in Idaho by high school graduate or higher, population 25 and over, 2022. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b15003.dat. Also distributed by Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/idaho-counties?period=2022.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs, Counties in Idaho by high school graduate or higher, population 25 and over, 2022 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b15003.dat, via Invokely: https://invokely.ai/rankings/high-school-graduate-or-higher/idaho-counties?period=2022 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_idaho_by_2022,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs: Counties in Idaho by high school graduate or higher, population 25 and over, 2022}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b15003.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/idaho-counties?period=2022. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary\_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b15003.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs: Counties in Idaho by high school graduate or higher, population 25 and over, 2022
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b15003.dat
L2  - https://invokely.ai/rankings/high-school-graduate-or-higher/idaho-counties?period=2022
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/idaho-counties?period=2022.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b15003.dat. Retrieved 2026-10-12.
ER  -
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Rank Counties in Idaho by high school graduate or higher, population 25 and over using official data, and cite the source.
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Questions

Which county has the highest high school graduate or higher, population 25 and over?

Madison County, with 97.4% in 2022, according to the U.S. Census Bureau.

Which county has the lowest high school graduate or higher, population 25 and over?

Clark County, with 61.7% in 2022.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. Retrieved 2026-10-12.

High school graduate or higher, population 25 and over: other rankings

Counties in Idaho: more rankings